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While virtual machines provide significant flexibility for users and administrators to clone, snapshot, migration and rollback with unprecedented ease, it also bring forth some new problems and negative effects to the security of computing environments. The applications and operating systems are forced to run in a dynamical and unregulated computing environment, which gives rise to so radical difference...
As an important nature of subjective trust, uncertainty should be preserved and exhibited in trust definition, representation and inference. In view of the problems in existing mechanisms based on random mathematics and fuzzy set theory, this paper designs a trust inference mechanism based on cloud model theory. We define trust and trust level in form of cloud. Then we propose new measure for formalized...
The uncertainties of grid nodes security are main hurdle to make the job scheduling secure, reliable and fault-tolerant. The fixed fault-tolerant strategy in jobs scheduling may utilize excessive resources. In this paper, the job scheduling decides which kinds of fault-tolerance strategy will be applied to each individual job for more reliable computation and shorter makespan. And we discuss the fuzziness...
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